37 Maintenance and/or repair of floor buffers, floor polish applicators, cleaning machines, propane buffers, scrubbers, carpet extractors, blowers, sweepers, vacuums, pressure washers, foggers, sprayers, dispensers, mop buckets and wringers, carts, dollies, and truck mounts, [ coffee brewers, ] janitorial equipment; technical support services, namely, providing technical advice in the field of janitorial services about installation, maintenance and repair of floor buffers, floor polish applicators, cleaning machines, propane buffers, scrubbers, carpet extractors, blowers, sweepers, vacuums, pressure washers, foggers, sprayers, dispensers, mop buckets and wringers, carts, dollies, and truck mounts, [ coffee brewers, ] janitorial equipment